subpanel1->Visible = true; $data = array('1', 'two'); $this->repeater1->DataSource = $data; $this->repeater1->dataBind(); } public function button1_callback($sender, $param) { $this->panel1->renderControl($param->NewWriter); $this->button2->Enabled=true; } public function button2_callback($sender, $param) { $this->panel2->Visible=true; $this->Page->CallbackClient->insertContentAfter('contents', $this->panel2); } } ?>